Polarization-insensitive Glass-to-Silicon Photonics Coupler

A numerical study on the design of a novel dual polarization, low loss, and low fabrication complexity, angled 3D Glass-to-SiPh coupling interface is presented. The interface is composed of a 2 degrees angled 3D glass waveguide attached to a thin-SOI platform. The coupler design and the optimization methodology relies on the optimum Constant Loss Taper (CLT) silicon taper calculation. The achieved coupling efficiency is 83.50% and 81.22% for TE and TM polarization state, respectively, at 1.55 mu m. The results are obtained using an EigenMode Expansion (EME) propagation solver and are verified through the 3D FDTD simulation method.